Stop motion for winding machines



Nov. 21, 1939. L. A. RUNTON 2,130,434

' STOP MOTION FOR WIl lDING MACHINES Filed March 14, 1938 2 $heets-$heet 1 INVENTOR ATTORNEY NOV. 21, 1939. RUNTON 2,180,434

STOP MOTION FOR WINDING MACHINES Filed March 14, 1938 2 Sheets-Sheet 2 INVENTOR 7 g m 4 WWW ATTORNEY Patented Nov. 21, 1939 UNITED STATES PATENT, OFFICE STOP MOTION FOR. WINDING MACHINES Leslie A. Runton, Andover, Mass.

Application March 14, 1938, Serial No. 195,733

7 Claims. (Cl. 242-18) In winding machines of various types where the yarn is wound upon a spool it is common practice to associate with the spool an idler roll over which the yarn draws in its passage to the spool. This idler roll is usually covered with leather or rubber in order that the yarn may have good frictional contact therewith for the idler roll is rotated by the drag of the yarn and assists in giving uniform tension to'the yarn wound upon the spool.

The spool on which the yarn is wound is driven from off a drum and its motion is stopped by means of a brake applied to this drum. When the brake is applied the drum will have some continued rotation, owing to momentum, before coming to a full stop. During the stopping of the rotation of the drum, by application of the brake, unless some provision be made for stopping the rotation of the idler roll over which the yarn is passing, this roll will continue to rotate, by reason than the peripheral speed of the drum. In consequence the yarn will be carried forward by the idler roll and become slackened and more or less tangled between this roll and the drum. It accordingly becomes necessary to obviate this continued rotation of the idler roll due to its momentum as the drum is stopped. It is common practice to apply a constant brake to the idler roll that it will have little or no continued rotation by reason of its momentum as the drum is stopped. Such a brake upon the idler roll tends to prevent the machine being operated at high speed and produces undue tension on-the yarn causing breakage.

The object of the present invention is to provide a mechanism which will permit of the idler roll associated with the drum being normally a freely rotatable roll, but with brake applied thereto for stopping its rotation when the brake is applied for stopping the rotation of the drum.

A further object is to provide a mechanism by which the braking effect on the idler roll will vary with the varying momentum of the roll itself, and this depending upon the varying momentum of the drum, In other words, I seek to obtain a certain synchronism between the stopping of the drum and stopping of the idler roll in order that when the machine is stopped strands of yarn will lie unslacked and preferably with some slight degree of tension between the idler roll and drum.

The invention can best be seen and understood by reference to the drawings in which an embodiment thereof is shown applied to a spooler, such portion only of the machine being shown as is necessary to a proper understanding of the invention.

Referring to the drawings:

Fig. 1 is a front elevation.

Fig. 2 is a side elevation.

Fig. 3 is a view, mainly sectional, of the idler tension roll, later to be referred to.

Fig. 4 is a view, mainly sectional, of the drive and stop mechanism for the drum, and which assists in applying a brake to the idler tension roll for stopping the rotation of this roll, as will later be referred to.

In the drawings: I represents the frame of the machine on which is mounted to rotate an idler tension roll 2 over which the yarn 3 is passed. This roll is rotated by frictional contact of the yarn drawn over it, on which account the roll is preferably provided with any suitable covering for obtaining good frictional contact between it and the yarn. I

From the roll 2 the yarn passes downwardly to extend through an eye bar 4, and thence forward to be wound upon a spool 5. This spool is driven from off a drum 6 through surface contact therewith irrespective of the amount of yarn upon the spool. l is the shaft bearing the drum.

The shaft 1 is mounted to turn on the frame of the machine and is a driven shaft. For driving the shaft 1 there is arranged upon it at one end thereof a drive element 8 having a hub 9 to which is keyed a pulley ID. This pulley is driven through belted connection (not shown) with any suitable source of power. The drive element 8 is arranged to turn freely upon the shaft 1 but retained against lateral displacement, a ball bearing connection I i being interposed between it and. the shaft. Arranged, also, upon the shaft 1 is a driven element l2. This element is secured to the shaft by a key 12' by which the element is made to rotate with the shaft, but has a certain amount of sidewise movement thereon. The element I2 is energized through any suitable source by subjecting it to electromagnetic influence, and when energized is moved to have contact with the faced edge l of the drive element 8 bearing the pulley, whereupon the driven element and shaft will become coupled to the pulley and be rotated as the pulley is rotated, In the drawings I 3 represents a ring made of some insulating material bracketed in suitable manner to the drive element 8 whereby it will rotate therewith. The ring I 3 carries a set of collector rings I3. In electrical contact with these collector rings is a set of stationary brushes M by which an electric current may be passed through the rings. The rings are in circuit connection with a coil 8' carried by and passed around the drive element 8 for magnetizing it when the electric current is passed through said coil and thereby attracting to it through electromagnetic influence said driven element I2 whereby the drive element 8 and driven element I2 will rotate together. On deenergizing the driven element l2 it is moved into an inoperative position with relation to the pulley, or drive element 8 on which the pulley is mounted, and a brake is applied for stopping the rotation of the shaft 1. To this end a disc 16 is keyed to the shaft 1 and lies interposed between the driven element [2 and the drive element 8, lying within the hollow of the drive element. Bearing against this disc are springs IT socketed within the driven element. When the driven element I2 is energized to have contact with the drive element 8 these springs are compressed, and when the driven element is de-energized the springs operate not only to move the driven element into a disengaging position with relation to the drive element carrying the pulley, but, also, into a position where a brake will be applied for stopping rotation of the shaft '7 and drum, For this purpose there is arranged upon the shaft 1 with bearing against the side of the frame I, a brake plate l3. This brake plate has a circular disc-shaped body from the edge of which projects an arm 20. The side of the body of the brake plate facing the driven element I2 is provided with suitable friction material or brake lining 21, and it is against this lining of the brake plate that the driven element is thrown by the springs I! when the driven element is de-energized, the brake plate then acting to exert a braking pressure upon the driven element and through the driven element a braking effect upon the shaft 1 and drum, The brake plate i8 is arranged to have a limited rotary movement around the shaft 1, but is otherwise a stationary plate. To this end the arm 29 on the plate is arranged to extend between spaced stops 23, 24, on the frame of the machine. These stops are preferably backed by springs 25 to lessen the shock as the arm 20 is thrown into contact therewith. The arm is held normally in contact with the stop 23 by means of a spring 28 connected to the frame of the machine. When the driven element is thrown into contact with the brake plate 58 the brake plate will be turned on the shaft 1 until the arm 20 contacts with the stop 24 Whereupon the braking eifect upon the driven element will become effective. The relative movement of the brake plate upon the shaft 1 when force is applied for braking this shaft is especially to be noted for this permitted rotary movement of the brake plate and arm carried by it is availed of to exert a braking effect upon the idler roll 2 around which the yarn is passed.

The idler roll 2 is borne by trunnions 28. Fixed to the end of the roll is a header 29 into which the'trunnions extend and on which the roll turns. The header 29 bears a grooved brake ring 36. Pivotally fixed to the frame of the machine at a point adjacent this ring is a brake shoe 3| which when brought into contact with the brake ring 30 exerts a braking effect upon the roll 2 for stopping rotation of this roll. The brake shoe 3! is retained in a normally disengaging position by means of a spring 32 afiixed to it, and connected to the frame of the machine, The brake shoe 3! is moved into braking engagement with the brake ring 30 by means of a draft cable 33 interposed between the free end of the brake shoe and the arm 20 borne by the brake plate I8. When the brake plate is turned by engagement of the driven element I2 with this plate for stopping rotation of the shaft 1, its arm 20 will be moved into contact with the stop 24, and themovement of the arm 2t! thus entailed will exert force through the cable connection 33 to draw the brake shoe 3| into braking engagement with the brake ring 30. The connection between the arm 2|] and the brake shoe 3| preferably contains within it a tension spring 35. The connection between the arm 20 and the brake shoe 3! is preferably, also, an adjustable connection as to length, adjustment being secured in any suitable manner. As shown the adjustable connection between the cable connection 33 and the brake shoe 3! is secured by afiixing a threaded rod 36 to the end of the cable. This rod is passed through an arm 31 extending from the free end of the brake shoe, and is held in adjusted position in relation thereto by means of threaded nuts 38 on the rod.

The speed of the roll 2 is governed by the speed of the drum and the momentum of the drum when braked is used to actuate the pull for stopping the roll 2. Consequently the degree of pull upon the draft cable 33 for applying the brake for stopping the roll 2 depends upon the rotary speed of the shaft '5, and drum carried by it.

In other words, the braking effect on the idler roll will vary with the varying momentum of the roll itself, and this depending upon the varying momentum of the drum.

I claim:

1. In a winding machine the combination comprising means for winding a yarn mass including a drum, means for driving said drum, means for stopping rotation of said drum including a brake, an idler roll from which the yarn passes to said drum, means for stopping the rotation of said roll including a brake, and means whereby the brake for said roll will be applied through an application of force developed by the continued rotation of said drum after disconnection of the means driving said drum.

2. In a winding machine the combination comprising means for winding a yarn mass including a drum, means for driving said drum, means for stopping the rotation of said drum including a brake, an idler roll over which the yarn passes to said drum, means for stopping the rotation of said roll including a brake, and means whereby the brake for said roll will be applied through force developed by the momentum of said drum after application of the brake for braking said drum.

3. In a winding machine the combination comprising means for winding a yarn mass including a drum, means for driving said drum, means for stopping the rotation of said drum including a brake, an idler roll from which the yarn passes to said drum, means for stopping the rotation of said idler roll including a brake, and means whereby the brake for stopping the rotation of said roll will be applied through an application of force developed by the rotation of said drum after disconnection of the means driving said drum and application of the brake for braking said drum.

4. In a winding machine the combination comprising means for winding a yarn mass including a drum, means for driving said drum, a brake for said drum including a brake element adapted and arranged to have a limited rotary movement on the application of said brake, means for limiting the rotary movement of said brake element, an idler roll from which the yarn passes to said drum, means for stopping the rotation of said roll including a brake, means for applying the brake for stopping the rotation of said drum whereby said brake element will be rotarily moved when the brake for said drum is applied, and means whereby the brake for said roll will be applied by said moving brake element/ 5. In a winding machine the combination comprising means for winding a yarn mass including a drum, means for driving said drum, a brake for said drum including a brake element adapted and arranged to have a limited rotary movement on the application of said brake, means for limiting the rotary movement of said brake element, an idler roll from which the yarn passes to said drum, means for stopping the rotation of said roll including a brake, means for maintaining the brake for said roll in a normally inactive position, means for applying the brake for stopping the rotation of said drum whereby said brake element will be rotarily moved when the brake for said drum is applied, and connecting means between said brake element and the brake for said roll whereby the brake for said roll will be moved into an active position by said brake element when said brake element is rotarily moved upon the application of the brake for stopping the rotation of said drum.

6. In a winding machine the combination comprising means for winding a yarn mass including a drum, a rotary shaft bearing the drum, a driven element rotatable with said shaft and displaceable laterally along said shaft, a drive element freely rotatable on said shaft and retained against lateral movement in relation to said shaft, one of said elements being adapted and arranged to be energized by subjecting it to electromagnetic influence whereby said elements will be connected and the shaft rotated by said elements thus connected, a brake for said drum including a brake element adapted and arranged to have a limited rotary movement around said shaft on the application of said brake, means for limiting the rotary movement of said brake element, resilient means normally tending to move said driven element away from said drive element into engagement with said brake whereby said brake will be rendered active to stop rotation of said shaft and drum and said brake element will be rotarily moved, an idler roll from which the yarn passes to said drum, a brake for said roll ocupying normally an inactive position, and means whereby,

the brake for said roll will be applied by said brake element when said brake element is rotarily moved upon the application of the brake for stopping the rotation ofv said drum.

7. In a Winding machine the combination comprising means for winding a yarn mass including a rotary shaft, a driven element rotatable with said shaft and displaceable laterally along said shaft, a drive element freely rotatable on said shaft and retained against lateral movement in relation to said shaft, one of said elements being adapted and arranged to be energized by subjecting it to electromagnetic influence whereby said elements will be connected and the shaft rotated by said connected elements, a brake arranged in braking relation to said shaft and including a brake element having a limited rotary movement about said shaft, means for limiting the rotary movement of said brake element, resilient means normally tending to move said driven element away from said drive element into engagement with said brake whereby said brake will be rendered active to stop rotation of said shaft and said brake element will be rotarily moved, an idler roll over which the yarn passes, a brake for said roll occupying normally an inactive position, and means whereby the brake for said roll will be applied by said brake element when said brake element is rotarily moved upon the application of the brake for stopping the rotation of said shaft.

LESLIE A. RUNTON; 

